Fiber trough coupling



FIG. 1 is a top, front, and right side perspective view of a fibertrough coupling according to the present invention;

FIG. 2 is a front elevation view of a fiber trough coupling of FIG. 1,with the opposite side being substantially identical;

FIG. 3 is a top plan view of a fiber trough coupling of FIG. 1;

FIG. 4 is a bottom plan view of a fiber trough coupling of FIG. 1; and,

FIG. 5 is a side elevation view of a fiber trough coupling of FIG. 1,with the opposite side being substantially identical.

The ornamental design for a fiber trough coupling, as shown anddescribed.